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Throttle Body Coolant Passage

Old 02-13-2008, 07:41 PM
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Default Throttle Body Coolant Passage

With all the trouble that people go to in installing an intercooler, I wonder why many people don't remove the coolant lines that go to the intake manifold? Has anyone disconnected theirs and have they seen any gains from doing so?
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Old 02-13-2008, 07:45 PM
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from what ive seen the gains are negligible. It is mainly there just to keep ice from forming on the TB and the air doesnt spend enough time in the TB to make a difference.
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Old 02-13-2008, 07:53 PM
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But its not just the TB that's heated, its the entire plenum. I'm pretty sure there's as much volume in there as a good-sized intercooler. Removing those lines should theoretically yield atleast a 5 or 10 degree drop in intake temps right?

Unless I'm missing something here.......to my knowledge there is no valve which controls flow of coolant into the manifold jacket. In other words coolant is always circulating through there.
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Old 02-13-2008, 08:08 PM
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Ive tried it, the car will not idle hot worth a damn
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Old 02-13-2008, 08:21 PM
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surface area to volume is very small in the plenum compared to an intercooler... and yeah the icing.
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Old 02-13-2008, 09:39 PM
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did anyone try to route a/c through intake manifold?
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Old 02-13-2008, 09:44 PM
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i removed mine, just take the coolant line from the thermostat housing and cut it and end it at the head bypassing the intake manifold and throttle body. I run an mspnp so i don't think it's at all necessary. the more stuff you can take out and don't need the better
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Old 02-13-2008, 10:00 PM
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Did you notice any problems in cold weather?
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Old 02-13-2008, 10:48 PM
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I removed mine. Didnt notice any difference anywhere. I just did it to make getting to the injectors easier.
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Old 02-13-2008, 10:51 PM
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Originally Posted by UrbanSoot View Post
did anyone try to route a/c through intake manifold?
lol cold air intake to the max!
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Old 02-13-2008, 11:05 PM
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Originally Posted by The_Pipefather View Post
Did you notice any problems in cold weather?
no, right after i was done i cleaned up the car, then took it to my grandparents garage for the winter where it's sleeping now, i will note that it didn't act any different than it did before
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Old 02-13-2008, 11:36 PM
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ahha browsing on ebay lookie lookie what i got hookie
http://cgi.ebay.com/ebaymotors/90-08...em250213751090
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Old 02-14-2008, 01:31 AM
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Originally Posted by Stealth97 View Post
Ive tried it, the car will not idle hot worth a damn
because you have to remove or plug the wax valve, first!
then an aftermarket ECU to control the idle because the stock one expects the wax valve.

(all this is for NA)
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Old 02-14-2008, 02:14 AM
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btw, its only the 1.6's that have the coolant running through the intake manifold.
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Old 02-14-2008, 11:08 AM
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It's a piece of hose. Am I missing something?
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Old 02-14-2008, 11:24 AM
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Originally Posted by j_man View Post
because you have to remove or plug the wax valve, first!
then an aftermarket ECU to control the idle because the stock one expects the wax valve.

(all this is for NA)

j_man, what's a wax valve? Where is it located?
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Old 02-14-2008, 11:27 AM
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and the dyno sheet is for a camaro.
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Old 02-14-2008, 11:36 AM
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i did it

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Old 02-14-2008, 11:40 AM
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Originally Posted by j_man View Post
because you have to remove or plug the wax valve, first!
then an aftermarket ECU to control the idle because the stock one expects the wax valve.

(all this is for NA)
I need the car to run right on the stock ECU once a year for an e-check, so this mod is out for me.
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Old 02-14-2008, 11:56 AM
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wax valve?! wtf.

all you have to do is plug the line from the IM and the line from the water neck....the end.

you can block and remove the AIR valve if you want like i posted above...this will not fail your emissions....
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